Packing overshot



sept. 2z, 1925.

M. S. BLACK ET AL PACKING OVERSHOT Filed Dec. 18, 1922 Patented ISept.22, 1925.

UNITED STATES. PATENT QFFICE.

MILLARD sUMTER. BLACK 4Ann FREDERICK ivi. BRAMBLEY, or BREA, CALIFORNIA.

PACKING OVERSHOT.

p Application filed December '18, 1922. Serial No. 607,705.

To all 'whom t may concern:

Be it known that we, MILL-inn SUM'rnn BLACK and FREDERICK M.l BnAMnLni',each a citizen of the United States, and residents 5 of the city ofBrea, county of Orange, and IState of California, have invented new anduseful Improvements in Packing Overshots, of which thel following is afull, clear, and accurate disclosure. I

This invention relates to a tool, and more particularly to a packingovershot, and it is an-object of this invention to provide a -tool ofthis character which is simple, effective and practical. With variouswell drilling` methods, and

particularly with the rotary drillinpr method,`

liquid is c.ireulatedusually upwardly around the drill pipe-in the holeto carry .out the cut'inaterial and to keep the hole clear. The desiredcirculation of liquid is -.usually maintained by pumping the liquidthrough the drill pipe which operates the drilling tool. l/Vhen thedrill pipe breaks, as it occasionally'does, it is, of course, necessaryto catch the broken off part with a suit- 'able tool and remove it fromthe well, and it is desirable, and, in many cases imperative, that thecirculation of liquid` which, of f course, is lost when the drill pipebreaks, be restored without too much delay.

'Tools known as overshots, have beende- 'veloped for the purpose ofcatching the broken-ott1 portions of a string` of drill pipe, andpacking means have been embodied in overshots for the purpose of packingthe connection between the overshot and broken`r off section of drillpipe so that the desired circulation of liquid can'be reestablished assoon as the brokeno section of drill pipe It is an object ofthe presentinvention rdrill pipe. '.By carrying out this object of ,our invent-ionwe provide a tool in which has been caught the overshot. Packing.

with the pipe proper, and, therefore, does not have to be aetlultedfveryfar fromlts normal position in order to make the desired connectionbetween the overshot andthe'broken-otl' string of driil'pipe.

`Aiiother object of. our invention is to provide a packing overshot inwhich the' `'packing means operates to effectively sealthe over-shot andbroken-oil'l string of drill 75 pipe before the overshot lifts thebroken-off string of drill pipe, but which is not and cannot be furtheractuated by operation'of the o'vershot to lift the broken-ott1 string ofthe paekihg is operated only sufficiently to make the necessaryconnection between the v oversliot and broken-off string of drill pipe,

and in which `the overshot operatesto lift'85 the broken-off string ofdrill pipe independentlyfof the ypacking means so that the packing-meansis not forced or put under undue strain when the overshot is operatingto lift or hold the broken-ofi string of drill pipe. i

Another' object of our invention is to provide a packing overshot inwhich the packing operating means has a definite limited range ofoperation, so that the packing means is only operated within the properlimits.

The various objects and features of our invention will be best and morefully understood from the following detailed description of a typicalpreferred from of our invention, throughout whichreference is had toAthe accompanying drawings, while the scope of our invention will beparticularly pointed out in the'ap'pended claims. In the drawings: i i

Fig. 1 is a vertical detail sectional view Aof apacking overshot,embodying the present invention, showing the various parts in theirnormal 'unactuated position;

Fig. 2 is a View similar to Fig. 1, showing 110,

a'string of drill pipe in connection `with the tool, and showing thetool in position on the drill pipe where it is sealed to thedrill pipeby the" packing means and is gripping the drill pipe to lift it uponupward movement;

Fig. 3 is a detail transverse sectional view of the tool, being a Viewtaken as indicated by line 3-3,on Fig. 1;

Fig. ,4 is a detail transverse sectionalview of the tool, taken asindicated by line 4-4 on Fig. 1; and

Fig. 5 is a detail transverse sectional view of the tool, taken asindicated by line 5-5 of Fig. 1.

The tool provided b our invention coinprises, generally, a bo y 10;means 11, carried bythe body 10 to grip or engage a string of drillpipe, or the like, to lift it?" Iupon upward movement of the body;packing means 12, arranged within the body and adapted to be actuated toengage a drill pipe arranged through the body to form a fluidvtight sealbetween the body and drill pipe; and operating means 13 for the packingmeans 12 adapted to be actuated by certain m5iso that it is uniform-insize and is smooth.

shoe 18, or the manipulation of the tool relative to a drill pipe toactuate the packing means 12 in the manne-r just specified. In Fig. 2 ofthe drawings, we show the tool in combination with a typical string ofdrill pipe 14 which comprises a plurality of pipe sections 15 connectedby suitable couplings 16.

The body 10 of the tool provided by our invention is preferably aunitary tubular member, internally screw threaded at its upper end sothat it can be` conveniently mounted on the lower end of a string ofpipe lor casing or on a suitable coupling device 17 mounted on the lowerend of a string of pipe or casing, and externally screw threaded at it'slower end so that a suitable guide like, can be conveniently mounted onit. The exterior of the body 10 is preferably smooth and uniform in sizethroughout the length of the body, as we have illustrated in thedrawings.l `An upwardly facing shoulder 19 is formed in the body 10 nearits lower end, and an annular pro]ection or flange 2O extends from theinner wall 21- of the body at a point spaced l considerably above-theshoulder 19. Abovev the Aflange 20 the inner wall 2.1 of the body ispreferably bored or otherwise finished The means 11, which we haveillustrated Y in the vdrawings for engagin f the string 14 of drill pipeso that it is lifted upon upward movement of the body, includes a plu--rality of resilient fingers 22. ,In the particular tool illustrated inthe drawings, there are four fingers 22 arranged symmetrically in thebody- 10, and secured to the body 10, as by suitable rivets 23, so thattheir lower ends seat on .the shoulder 19 while their inwardly from theinner wall 21 of tlfe body.

The\fingers 22 are made resilient and `are proportioned so that .theycan be depressed or forced outwardly until they lie close to .the innerwall 21 of the body 10. This particular means 11 is the general typeIcommonly used in overshots, and is herein illustrated as a typical meanswhich may be employed `in carrying'out our invention. The operation ofthe means 11 Will be obvious to those familianwith the art. As the body1() passes downwardly over astring of drill pipe, or the like, thefingers 22 are depressed by their passage over the couplings 16 and bearclosely onthe sections of pipe 15v so that they will engage under acoupling 16 when the tool is moved upwardly to conneet, the tool andstring of drill pipe so that the drill pipe will be carried up with thetool.

The packing means 12, which we have illustratedin the drawings, includesan annular body 24 of expansible packing, for instance, rubber, a lowerring 25 arranged at the lower end of the body of packing,

and an upper'ring 26 arranged at the upper end of the body 4of packing.In accordance with our invention the packing means 12 is supported inthe' body 10 by the flange 2O which ,is located immediately above theupper ends of the fingers 22. rllhe packing means is arranged in thebody 10 through the upper end thereof so that the lower ring 25 seats onthe flange 20. We provide the packing means 12 with the lower ring- 25so that the lower end of the body of packing 24 will' be completelysupported and will not bei forced into the notches 27pmvided in theiiange 20, as hereinafter delscribed. We form the rings 25 and`26 withrecesses 28, which receive flanges 29 provided on-thevends of the body'lof packing to hold the body of packing in the rings. T he upper ring .26is slid-ably carried in the y -body 10 and is adapted to be moveddownwardly. to actuate or compress the body 24 of packingso that itexpands inwardly to engage a coupling 16 and thereby sealing the body 10with a string of drill pipe. In the particular form of constructionillustrated in the drawings, the ring 26 is re- `tained in the body 10by the coupling de- 13, provided .by the fiat straplike members,riveted, or otherwise suitably secured, to the ring 26 of the packe ingmeans so that they extend downwardly through suitable openings 32 cast,or other-v wise suitably formed, in the packing means. N otches orrecesses 27 are provided 1n the flange 2() to pass and more or lessguide the arms 30. 7e prefer `to arrange the arms 3() arms 30 and havingtheir upper portions extending freely upwardly and inwardly through thebody so that .their upper ends are normally spaced somewhat above theupper ends of the fingers 22 and are spaced inwardly from the inner wallof the body. The fingers 31 are adapted to operate in a manner more orless similar to the fingers 22. When the tool is being passed downwardlyover a string of drill pipe the fingers 31 will be depressed or forcedinwardly by the couplings 16 and will bear closely against the sections15 of the pipe so that they will engage under a coupling upon the toolbeing moved upwardly. In the particular tool illustrated in thedrawings, we have shownfcur arms 30 and fingers 31., arrangedsymmetrically in the body so that they come between the fingers 22.

In operating the tool-it is lowered over the string 14 of drill pipewhich is to be lifted until the fingers 22 and 31 have completely passedover at least one coupling 16. The body 10 isthen moved upwardly causingthe fingers 31 to engage under a collar 16 so that they are held by thecollar andin turn hold the upper ring 26 of the packing means and thebody is moved on upwardly until the lingers 22 engage under the collar16. While the ring 26 is being held and the body moved upwardly the bodyof packing 24 is, of course, compressed between tne ring 26 and flange2() so that it expands inwardly and engages the coupling 16, as we haveclearly illustrated in Fig. 2. When the fingers 22 engage under thecoupling-16 further upward movement of the body will not further actuatethe packing means to further expand the body of packing, but will causethe string 14 of drill pipe to be carried along with the tool andwillcause the packing means to bel maintained in the actuated conditionso that the body is effectively sealed to the coupling 16. It will beob- `vious, of course, that fluid forced down through the string of pipeor casing carryh ing the tool will pass through the string of drill'pipeheld by the tool rather than out between the tool and the string ofdrill pipe.

It is to be particularly noted that the tool V-provided by my inventionis extremely simple in its construction and operation, that it isparticularly'compact so that it can be passed through a hole onlyslightly larger in diameter than the couplings 16 of the string 14 ofdrill pipe, that the parts are so related that the' packing meanscooperates with a coupling rather than a section of' pipe, and,therefore, the body of packing needs to be expanded only slightlyinwardly to engage the string yof drill pipe, and that` the packingmeans is actuatedonly a prede* ourselves any changes or variations thatmay appear to those skilled in the art or that may fall within the scopeof the following claims. f

Having described a preferred form of our invention, we claim:

1. A tool of the character described adapted to operate on a stringofpipe including sections joined by couplings which includes, abodypadapted to pass over the string of pipe, means carried by-the bodyand adapted to cooperate with a coupling of the string of pipe to make aconnection between the body and the string of pipe, whereby the stringof pipe is moved with the body, and packing positioned with reference tosaid means to` engage a coupling of the string of pipe to pack the bodywith the string of pipe. i f

2. A tool Vof the vcharacter described adapted to operate on a string ofpipe in- 'cluding sectionsjoined by couplingsr which includes, a bodyadapted to pass over the string of pipe, means carried by the body andadapted to cooperate with a coupling to make a connection between thebody and the string of pipe whereby the string of pipe is moved with thebody, and packing arranged in the body to engage said coupling to packthe body with thestring Vof pipe.

3. A tool of the characterv described adaptedfto operate on a string ofpipe including sections joined by couplings which includes, a bodvadapted to pass over a string of pipe, means. carried by the body andadapted to'cooperate with a coupling to make a connection between thebody and the string of pipe whereby the string of pipe is moved with thebodyyand packing means independent of said first mentioned means Imovetogether.

and adapted to'cooperate with said coupling to pack the body with thestring of pipe.

4. A tool of the character described including, a body'adapted to passover a, pipe, means carried by the body for cinnecting the body with thepipe, packing carried by the body. and means operable independently ofsaid lirstmentioned means for operating the packing vso that it packsthe body with the pipe.

. 5.'A tool of the character described including al body adapted to passover a pipe, packing. ca rried by thelbody operable to engage the pipe,and two parts carried by the body and related to successivelyHcooperatively engage the pipe upon upward movement of the body relativeto the pipe, the first part tocooperatively engage the pipeoperatingmthepacking and the'qother part connecting the pipe and body sothat they 6. A tool of the characterdescribed including, atubular bodyadapted to pass over a pipe, ineans carried by the body tov connect itwithkthe pipe upon lits being raised, packing carried by the body,operating means `for the lpacking operable independent' f said othermeans to 'actuate the packing upon raising of the body yso that the bodyis packed with the pipe, and means Vlimiting the ating means.

range of operation of the oper' 7. A tool of the character describedadapted to operate on a string of pipe including sectionsl joined bycouplings which includes, a body adapted to'pass over the sti-ing ofpipe,'a d means operative by up- Ward movement of the pipegto pack thebody` with. the pipe at a coupling "and thereafter connect thebodywith-'lthe pipe Aso'that it is moved* wi,th,tlie'body,l said 'meansincludingf-tw ,independently operable members adapted .tpcooperatefgwitlr a coupling one4 .5" @ferm-aha the;4 character describedj stringpfrpipe in-. 'cluding'sectons'j j which'V includes, a: bodyadapte 1 y'to'l o'c'er,- the string ,of pipe, means carried bythefbodyand adapted to cooperate with av coupling to make a connection betweenthe-body and the string off pipe wherebyI` the string of pipe is movedwith "they body, and packing means arranged 1 iniy to cooperate thestringof pipe', vsaid Vpa",czliligg means -inf i'cluding packingarranged to'engage 'with the coupling and a resilient member foroperating the packing and arranged to'cooperatively engage 'thecoupling.

`9. A- tool of they character described. ada ted to operate cna stringof pipe inl the body to connect the body with the pipe,

` packin carried by the body to be at a coupling w en the body `isconnected with the pipe, and operating means for the packing includes, atubular body adapted'to pass over the pipe, means carried in the bodyand adapted to cooperate with a coupling to connect the body with thepipe, packing carried in the body above said means so that it is at thecoupling cooperating with said means, and operating means for'thepacking including a resilient lmember connected with the packing andarranged to cooperate ,with the coupling with which said firstvmentionedmeans cooperates. 11. A tool of the character describedadapted to operate on a string of pipe including sections joined bycouplings which includes, a tubu ar. body adapted to pass over the pipe,means carried in the body and adapted to cooperate with a coupling toconnect the ybody with the pipe, packing carried inthe body above saidmeans so that it is at the coupling cooperating 'with said ing inchlingan arm extending down wardly from' the packing and a finger ex- 'itending upw-ardly from the lower part ofthe arm to ccoperate with thecoupling with which the first mentioned means cooperates.

. 12.v A tool of the character .described means, and operating means'forthe pack-- adapted to operateon a string of pipe'including sectionsjoined by coupling which includes, a tubular body adapted to pass overthe pipe, a projection in4 the body, a resilient member secured in thebody below the projection so that it extends freely up Wardly. andinwardly in the body, a body of packing carried on the projection, aring -slidabl'y,-carrie'lI inthe body above the pack- *to extenddownwardly through 'the packingA the bod so that its upper end isnormally above t e upper end of saidmember.v

. 13. A tool of the character described in,--

cluding, a body adapted to. pass over a pipe,

packing means' carried by the body and :adapted to be actuated to engagethe pipe by movement of the body in one directiomfand a member carriedby the body to engage and move the pipe when the body is moved in saiddirection and to limitthe operation of' the packing meansT v a 14. Atool of the character described 1 cluding, a body adapted to pass over apipe,

berg sped .to engage there, 011@ "P011- packipg carried by the body,andV two mem.

to extend freely vupwardly and inwardly in 116 .l5.A tool of thecharacter described ladapted to operate on a pipe, including sectionsjoined by couplings, embodying a body adapted to pass over the pipe, twospring hngers in the body related to engage a single coupling, oneconnected to the body and adapted to move the pipe and the otherconnected with the packing to actuatc it. l

16. A tool of the character described adaptedl to operate'on a string ofpipe including a body, packing carried in the body, and operating meansfor the packing having a pipe engaging member at a point below thepacking.

i7. A tool of the character described adapted to operate on a string ofpipe including, a body `adapted to pass over ther pipe, packing carriedin the body, and means ior operating the packing including an arm`between two members, the upper one being movable, an arm extendingdownwardly 'from the nppcr member to `a joint below the packing, and aspring iinger extending upwardly from the lower portion of the arm toengage the pipe.

19. ln a device of the character described a tubular body, an annularpacking carried in the body, a movable ring' at the .upper end ot' thepacking, means for "operating the ring to expand the packing including amember extending downwardly from the ring to a point below the packinganda finger in connection with the member below the packing.

20. In a device of the character described a tubular body, an annularpacking carried in thefbody, a movable 4ring at the upper end of thepacking, means for operating the ring to expand the packing including amember extending .downwardly through the packing to a point below thepacking and a finger extending upwardly from the lower end of saidmember.-

In witness that we claim the foregoing we have hereunto subscribed ourname this 1st day of December, 1922.

M. SUMTER BLACK. FREDERICK M. BRAMBLEY.

